This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A124338 #12 Dec 15 2024 15:46:31 %S A124338 41,409,4079,40787,407861,4078609,40786087,407860853,4078608529, %T A124338 40786085251,407860852417,4078608524153,40786085241529, %U A124338 407860852415231,4078608524152277,40786085241522707,407860852415227039,4078608524152270349,40786085241522703351,407860852415227033453 %N A124338 Largest prime < 10*a(n-1), a(1)=41. %H A124338 Vincenzo Librandi, <a href="/A124338/b124338.txt">Table of n, a(n) for n = 1..200</a> %t A124338 NestList[NextPrime[10 #, -1]&, 41, 30] (* _Vincenzo Librandi_, Jun 28 2014 *) %Y A124338 Cf. A124262. %K A124338 nonn %O A124338 1,1 %A A124338 _Artur Jasinski_, Dec 16 2006